1557004442031 has 6 divisors (see below), whose sum is σ = 2249006416280. Its totient is φ = 1038002961348.

The previous prime is 1557004442027. The next prime is 1557004442039. The reversal of 1557004442031 is 1302444007551.

1557004442031 is a `hidden beast` number, since 1 + 5 + 5 + 7 + 0 + 0 + 444 + 203 + 1 = 666.

It is not a de Polignac number, because 1557004442031 - 2² = 1557004442027 is a prime.

It is a super-2 number, since 2×1557004442031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557004442039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86500246771 + ... + 86500246788.

Almost surely, 2^{1557004442031} is an apocalyptic number.

1557004442031 is a deficient number, since it is larger than the sum of its proper divisors (692001974249).

1557004442031 is a wasteful number, since it uses less digits than its factorization.

1557004442031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173000493565 (or 173000493562 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 1557004442031 its reverse (1302444007551), we get a palindrome (2859448449582).

The spelling of 1557004442031 in words is "one trillion, five hundred fifty-seven billion, four million, four hundred forty-two thousand, thirty-one".